塑料薄膜是日光温室和塑料大棚最重要的物资之一,它的特性与质量,直接影响日光温室和大棚的光热效应,以及棚内种植作物的品质和产量。随着塑料工业的发展,透明覆盖材料的种类及性能不断增多。目前,我国生产的塑料薄膜主要有聚乙烯膜、聚氯乙烯膜、醋酸乙烯膜和聚酯薄膜等。在此基础上,又衍生出了无滴膜、增温膜、彩色膜、多功能复合膜等,最近,又出现了新型双层保温膜。为了明确双层保温膜的温、光性能及对蔬菜生长的影响,我们进行了二年的生产示范试验。现将结果报告如下: 一、供试材料双层保温膜:广东省顺德市现代包装材料厂有限公司生产的“万通牌”聚乙烯类塑料薄膜。对照棚膜:吉林省浑江塑料厂生产的聚 Plastic film is one of the most important materials in solar greenhouse and plastic greenhouse. Its characteristics and quality directly affect the photothermal effects of solar greenhouse and greenhouse, as well as the quality and yield of crops grown in greenhouse. With the development of the plastics industry, the types and properties of transparent cover materials continue to increase. At present, our country mainly produces plastic film polyethylene film, polyvinyl chloride film, vinyl acetate film and polyester film. On this basis, but also derived from the drip film, warming film, color film, multi-functional composite film, recently, there has emerged a new double-layer insulation film. In order to clarify the temperature and light properties of double-layer thermal insulation film and the impact on vegetable growth, we conducted two years of production demonstration test. Now the results are reported as follows: First, the test material double insulation film: Shunde City, Guangdong Province, modern packaging materials Co., Ltd. produced “Wantong card ” polyethylene plastic film. Control film: Jilin Province Hunjiang Plastic Factory production poly